Statement: All stones are rivers. All rivers are cars. Some cars are trains. Conclusions: I. Some trains are stones. II. Some cars are stones. III. Some trains are rivers.
Correct Answer: Only II follows
Explanation:
All stones are rivers + All rivers are cars = A + A = A = All stones are cars → conversion → Some cars are stones (I) Hence II follows. All rivers are cars + Some cars are trains = I + A = No conclusion Hence II and consequently I do not follow.
